Aurecon Australasia Pty Ltd ABN 54 005139 873

Level 14, 32 Turbot Street Brisbane QLD 4000

Locked Bag 331 Brisbane QLD 4001 Australia

Memorandum

To Patrick Atkinson

T +61 7 3173 8000 F +61 7 3173 8001 E brisbane@aurecongroup.com W aurecongroup.com

From

Copy Adam Yem, Morag Elliott Reference

Date 24 February 2017 Pages {including this page)

• aurecon

Corey Roderick I Chris Schell

247103-008

7

Subject Assessment of proposed amendments to the Ellendale Rehabilitation and Revegetation Plan

Patrick,

This memorandum details the findings of Aurecon's assessment of the amendments to the Ellendale Rehabilitation and Revegetation Plan (for the development previously known as the Cedar Woods Development) made by on behalf of the proponent (Cedar Woods Properties Limited) on the 81h

February 2017. This assessment was undertaken with the view to determine if the intent of Condition 8 of the Ministerial approval has been achieved.

Specifically within Condition 8 (Rehabilitation Plan), point (v) states:

"Bushland restoration works to target areas that are currently deficient of an existing vegetation structure and floristic composition and will ultimately aim to achieve vegetation structure and floristic composition that is commensurate with the regional ecosystem identified on the site. Alternative regional ecosystems may be appropriate for areas with landforms influenced by unnatural levels or soil moisture or altered landform."

It is understood that amendments to the previous Ellendale Rehabilitation and Revegetation Plan were made on behalf of the proponent in order to alleviate issues associated with potential bushfire hazard ratings associated with the proposed vegetation communities, with the updated Rehabilitation Plan significantly reducing these risks.

Methodology followed

In order to determine if the intent of Condition 8 of the Ministerial decision has been achieved, Aurecon undertook an assessment of the original Rehabilitation and Revegetation Plan prepared by 28 South Environmental for Cedar Woods Properties Limited (dated Monday 21 September 2015 and referred to in the development approval dated 151h January 2016), and compared this to the updated Rehabilitation and Revegetation Plan titled Cedar Woods Regional Ecosystem prepared by Land Partners (plan number WC006686.000-015) on the 81h February 2017 for Cedar Woods Properties Limited.

Specifically, the following comparisons were undertaken in relation to the Category 3 Corridors as identified in the Infrastructure Agreement for the development:

a. Comparisons of the Regional Ecosystem (RE) codes used for rehabilitation purposes detailed in the Rehabilitation and Revegetation Plans

b. Comparisons of the habitat differences between the RE codes detailed in the Rehabilitation and Revegetation Plans

c. Determination of whether any changes are "commensurate" of the RE codes for the development

d. Assessment of whether any changes will fulfil an ecosystem function role for the development.

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In addition to the consideration of ecological matters relating to the proposed updated Rehabilitation and Revegetation Plan, an assessment has also been undertaken to confirm whether proposed changes to vegetation types for the development will materially impact on the stormwater function of the Category 3 corridors, and therefore compliance with the conditions of the Ministerial decision .

2 Findings

Ecology assessment

Assessment of the original Rehabilitation and Revegetation Plan indicates that within Category 3 Corridors three (3) REs were proposed (ie RE 12.3.2, RE 12.3. 7 and RE 12.11.3). By comparison, these areas have now, as part of the updated Rehabilitation and Revegetation Plan, been amended to reflect five (5) REs (ie RE 12.3. 7, RE 12.3. 7b, RE 12.3.16, RE 12.11 .3a and RE 12.11 .25). In addition to these REs, several additional "non-remnant" treatments are proposed (ie. Low grass or tree Cover in rural areas, Low grass or tree Cover in built-up areas and Low grass or tree Cover in built up areas - Fig treatment).

A summary of the original RE code proposed for revegetation and the updated RE codes/treatments is provided in Table 1 attached with this memorandum.

Comparison of the two Rehabilitation and Revegetation Plans indicates that reduction in the fire risk/frequency of burns has occurred as a result of the modified RE codes (refer to "fire management guidelines" within Table 1 ). In addition it is also noted that the updated RE codes, with the addition of "Fig treatments", provide increased habitat opportunities for fauna when areas are fully restored (eg Wetland REs, increased availability of food and structurally diverse ecosystems). Furthermore, the additional REs contained within the updated Rehabilitation and Revegetation Plan are known to support conservation significant species (ie Coxens Fig Parrot (Cyclopsitta diophthalma coxem), Native Jute (Corchorus cunninghamit), Macadamia spp. and Native Milk-vine (Marsdenia spp.). The greater diversity of habitats and vegetation structure is likely to result in an increased ecosystem role for the development.

It is considered from this assessment that although some of the amendments in the updated Rehabilitation and Revegetation Plan are not analogous to the original Plan or REs present on site, the proposed RE changes are likely to result in the following benefits:

D An increased ecosystem function role for the development

1:1 Reduction in potential bushfire hazard ratings

• Vegetation that is structurally similar to the REs proposed by the original Rehabilitation and Revegetation Plan

11 Provision of a diversity of habitats capable of supporting conservation significant species

1:1 Provision of continuous rehabilitation zones that will facilitate fauna movement through the development

It is therefore considered that, from this assessment of the updated Rehabilitation and Revegetation Plan, the proposed REs generally correspond to the REs identified on the site in relation to vegetation structure and general species diversity. In addition, alternative REs have been proposed where landforms/landzones dictate a more appropriate RE.

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Stormwater Assessment

Vegetation has the potential to impact upon flooding, as denser vegetation has the ability to slow down flood waters and therefore increase flood levels. Aurecon have reviewed the proposed change in vegetation densities at elevations which are potentially impacted by flooding. This review shows that no changes are proposed to the vegetation types in the immediate vicinity of the flow paths.

There are some changes in vegetation density proposed in areas not directly connected to the flow paths, which may increase flood levels a small (presently unquantified) amount. Calibre undertook a sensitivity analysis as part of their original assessment, which showed that if vegetation densities were significantly increased, the minimum development levels would still maintain adequate freeboard . For this reason it is expected that a small increase in flood levels would not impact upon the flood immunity or freeboard of the development and it is not considered necessary to quantify any increase in flood levels.

Overall, Calibre's assessment that "there will be no material change to the outcomes of the flood investigation as a result of the updated vegetation rehabilitation plan" is consistent with the outcomes Aurecon's review.

3 Conclusion

Aurecon's assessment of the updated Ellendale Rehabilitation and Revegetation Plan has found that the proposed changes to vegetation types and densities within the Category 3 corridors will maintain the intent of the original rehabilitation strategy and will not materially impact on the stormwater function of the corridors. Accordingly, it is considered that the updated Ellendale Rehabilitation and Revegetation Plan is consistent with the conditions of the Ministerial decision, and specifically with the intent of Condition 8 (Rehabilitation Plan).

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AmeconAustralnlaPtyltd ABN 54 005 139 873

Level1 4, 32Tutbo1Street Brisbano OlD 4000

locJced8ag331 Brisbane OlD 4001 Australia

Memorandum

T -+61731738000 F -+617 3173 8001 E btis bane@aurecongtOOp.com W aureeof"9'"0UP.com

• aurecon

Table t. Summ;uy of dltfrtenee.s brtwun the Orfglnal and the New RehabOII;~Uon and Revege.bUon Plan for the Eflendale Development

Original Rehab\lllaUon Units

RE Descrlpl ion (REDO) proposed

Category 3 Corridors

Hablla t features

Fire Management Guidelines (REDO)

Amended Rehabilitation Units

REproposed Description (REDO) Habitat features Are Management Guidelines (REDO)

Differences between proposed REs

Summary of benefits/detractions as a result of the proposed changes

11 2. 3.7~-:;;:;ar;:O\::c,:.rn'':nc::;gl"ng=---;-pnc,ccov::;id:;:e"•--"s"'T'"RATEGV: r.r2.JJ

woodland of habitat for Avoid - ·-Narrow fringi"'ng"'w:::ood= l=an"'d"o'r ---,-;;P,=o"'vid"'e=, •ha:.b"'il:.al7ro=r-r<srRATEGY: Avoid !NOditr~er~e""nc"'e---,.i "o"'v•'"ra" ll"lh""e amendmeniTo Tti8 RE provides

Eucafyptus fereticomis, Casuarina Koala (Koala food intentionally Same RE 1 additional habitat in the form of wetland

112.3.2

I

Eucalyptus Koala (Koala lereticomis, food trees Casuarina present}

~~~~:.ghamiana Acts as a

cunninghamiana +/- fauna conduit Mefaleuca viminafis, along riparian Waterhousea corridOfS

floribunda. Other species associated with lhls RE include Mefa/euca bracteata, M. trichostachya, M. finariifofia and M. f/wiatifis In north of bloreglon, Lomandra hystriK often present in stream beds. Occu~ on fringing levees and banks of rivers and drainage Hnes of alluvial plains throughout the region

~~~~:::;;:ndis +/- ! ~:~~aa;;,du it Lophosteman I along riparian confertus taU open corridors forest with vine forest

1

H b' understorey ('Ytel tha •tat fo~ scterophyll'}. Patches

1 reatene.

of Euc.a/yptus pifufaris 1 ~:i~;t:Cies sometimes present t M d g.

near

especially In vicinity oft ar~l ;,ma d sedimentary rocks ongl 0 8 an

----- ---

Intentionally burning this fringe vegetation. Burn surrounding ecosystems In conditions that would minimise fire incu~ion.

SEASON: l ate summer to autumn

INTENSITY: Moderate to high

INTERVAL: Minimum 20 years, maximum unknown,

cunninghamfana subsp. trees present) burning this fringe l communities and m.aintains th e Intent of the cunninghamiana +I- Mefa/euca vegetation . Burn ~~ original rehabilitation strategy. The change viminalis, Waterl10usea floribunda, ~:i~ :~!~~na surrounding is considered to be commensurate In Other species associated with this ecosystems In ,. relation to vegetation communities oo site. RE Include Mefaleuca bracteata, M. riparian corridors conditions that trichostachya, M. linariifo/ia end M. would minimise fire No change in fire management

flwiatifis in north of bioreglon. incursion. I Lomandra hystrix often present In stream beds. Occu~ on fringing levees and banks of rivers and drainage tines of alluvial plains throughout the region

f2 .. 3'.'7"'b--+.R"'Iv-e~rin-e-,.l'-,."ila-n'd-or""r"'ring--.-ln-g ~,lv-e~rin_e_,hp=-,o-v'ld'e-, h' e"'b"'ila"'l 7ro-r - Wetland associated community

walland. Naturally occurring wetland species waterho/es and lagoons, both permanent and lnlermitlent. Includes exposed stream bed and bars. Occurs In the bed of active (may be intermittent} river channels

12.11 .3a Lophostemon confertus +1- Acts as a fauna SEASON: l ate Different When compared to the original RE, the Eucalyptus microcOTyS, E. camea, E. conduit along summer to autumn. landzones proposed REs vary significantly in relation propinqua, E. major, E. slderophloia riparian corridors

INTENSITY: Absence of to land zone, canopy cover (ie Vine forest,

woodland. Occurs In gullies and Habitat for Moderate to high. Eucalyptus

Tall open forest, open forest and woodland) exposed ridges of Palaeozoic and and habitat that they would provide to flora older moderately to strongly

threatened flora INTERVAl:

grandis and fauna.

deformed and metamorphosed species including Minimum 20 years,

(Flooded Gum) Marsdenia /ongi/oba However, the proposed REs do reflect

sediments and interbedded volcan ics and near threatened

maximum RE 12.113a vegetation and landscape features that are

species including unknown, requiring represents

currently present on site (ie wetland areas, Uparis simmonds1i.

further research. onsite vegetation

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Orlglnal RehabllllaUon Units

RE Desc ription (REb D) proposed

Habita t features

Fire Management Guidelines (REDO)

• aurecon

Amende~l!tallon Unils

REproposed Description (REDO} Habitat features Fire Management Guidelines (REDO)

Differences between proposed REs

Summary of benefits/detractions as a result of the proposed changes

j '--'~-~r-;F"'r'-'ing"'in::':g:-::s'lrea~m::sc::a::cnd:ri'-;th;::r::cea:;:le::':n::ced:;--"~ ro:,eq::cu::;cin"-·n=g<fu::;rth;::e:::r"t--~ -'-+~ ----~~~-~--r-.po::,o:::vi"'de::':s:-;food::'::J ---~------r------r:::p,;;;e;:;se;;;n;:;ce;-;o:<r"c::::ory"'m"b'i1a::':h::e;;;nryr"·,-;;a;;;nd,-ce;;;:xo;;is'"un;;;g-1

in narrow gullies in species research resources for Koalas landzones (ie Land zone 11 )),

high rainfall areas including f-..12".3".1;<6- - +.c"=o=m:::p;::lex= no:;:lo:;;p;::hy::;;ll-;:lo:-:m::;i:::cr=op"'h"yl"l v"-in=e+ H"'a"'b"'ioa"o'-ro::-r --- h s"TR""A"T"'E"'G"Y": A"'v=oi:;-d + c'=o=m=m:::u:::nit;::y- -j In relation for flora and fauna habitat ;;~a;~ndsii forest on alluvial plains threatened flora intenUonally generally lacks values, the proposed REs are likely to

species including burning this Myrtaceous provide a greater diversity of fauna habitat Provides hab itat for

1 Koala (Koala l food trees / present)

I_

12.11 .25

12.3.7b

I Corymbia henryi and/or Eucalyptus fibrosa subsp. fibrosa +I- E. crebra, E. camea, E. tindafiae woodland on

1 melamorphics +/-interbedded volcanics

!

Melaleuca brac/eata open foresl +/­emergent Eucalypts tereticomis. Occurs in drainage depressions on

Xanthostemon communlly species (Eg. values and an increase in food availability appositffofius, Eucalyptus, to frugivorous (ie fru it -eating) species (ie Fontainea rostrata, Lophostemon, Flying foxes, possums, parrots and native Macadamia integrifo/ia and M. ternifo/ia.

Habitat for threatened fauna species Including Coxon's Fig Parrot (Cyclopsitta diophthafma coxem) and the Richmond Birdwing Bulterfly (Ornithoptera n"chmondla)

Important for fruit­eating birds, many of which migrate seasonally from upland to lowland rainforest

Habitat for threatened nora species including Sophora fraseri

Provides food resources for Koala

Provides habitat for small insectivorous birds such

SEASON: Summer to winter

INTENSITY: Low to moderate

INTERVAL: 4-25

years

STRATEGY: Avoid intentionally burning this community

Corymbia and pigeons) as a result of incorporating native Me/a/euca) Fig species into the rehabili tation area.

Landzone, community dominated by Eucalypts species other than E. grandis

Absence of E. grandis and vine forest understory and presence of

In relation to fire management strategies, the proposed amendments to the rehabilitation REs would result In a reduced fire risk overall.

Document No. 5

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Original RehabllllalJon Units Amended Rehabilitation Unila Differences Summary of benefit.sldelractlons as a

r ·RE Habitat features Are Management between result of the proposed changes

Oucrlpllon (REDO) Habitat Fire REproposed Oe..scrlptlon (REDO) proposed REs proposed features Management Guidelines

Guidelines (REDO) (REDO) I Quaterna'}' alluvial plains. Rivenne emergent E.

wetland or fringing riverine walland. tereticomis and M. bracteata

low grass or Non--remnanl, NIA Figs will provide a N/A Non·remnant

tree Cover in valuable food source area

bum up areas forvagile frugivorous

- Fig species such as treatment Flying Fox (Pferopus

spp).

low grass or Non-remnant, NIA Open areas will NIA Non-remnant

tree Cover in provide habitat for

buill up areas grassland species, the inclusion of trees

will provide cover for Insectivorous birds.

12.11 .3 Eucalyptus Habitat for SEASON: 12.11.25 Corymbia henryiandior Eucalyptus Habilatfor SEASON: Summer Corymbia hen'}'i I When compared to original RE, !he siderophfoia and £ threatened Summer to fibrosa subsp. fibrosa +/- E. crebra, threatened nora to winter Is the dominant proposed REs have a reduced fire risk (le propinqua open foresl nora species winter £ camea, E. tindafiae woodland on species Including

INTENSITY: Low to species- Renee! burn intervals are greater). Although RE

+1- E. mlcfOCOfYS, Including INTENSITY:

metamorphics +/- interbedded Sophora fraseri moderate

species 12.11 .3a Is considered analogous toRE

Lophostemon Con; horus Plan for low to

volcanics Provides food

ldenlified on 1 12.11 .3 In relation to vegelation confertus, Corymbla cunninghamii,

moderate resources for Koala INTERVAl: 4-25 site. Presence management status, dominant species

lnlermedia, £ Marsdenia Unplanned

years of E. fibrosa in within these two communities differ, 'Nith biturbinata, £ coronata, and RE12. 11.25. RE 12.11.3a being typical of gullies and

acmenofdes, E. Sophora occasional high

Absence of vine

1 areas or higher moisture.

tereticomls, E. fraseri and Intensity wildfire

moluccana, near will occur. forest The proposed REs are characterised as

Angophom /eiocarpa. lhreatened INTERVAl: 4-8 undeo;tory I "Woodland ' , and !he original RE is

categorised as "Open forest" therefore Syncarpia verecunda species years maintains 12.11 .3a Lophostemon confertus +f- Acts as a fauna SEASON: late Dominated ~y L planting densities would be slightly reduced w ith vine forest including a healthy grassy Eucalyptus microcorys, E. camea, E. conduit along summer to autumn confertus, Wlth as a result of the proposed changes. species and E. Acomis acoma system. 8-20 propinqua, E. major, E. siderophlola riparian COfridors lesser quantities grandis or E. saligna years for woodland. Occurs In gullies and

INTENSfTY: of Eucalyptus

in gullies. Eucalyptus Provides

shrubby exposed ridges or Palaeozoic and Habitat for Moderate to high

species . habitat for threatened nOfa pifularis and E. Koaia(Koala

elements or older moderately to strongly species Includ ing

INTERVAl: Community tindaliae sometimes underslorey deformed and metamorphosed Minimum 20 years, typical of gullies .

food trees Marsdenia Jongiloba presenl Occurs sediments and Interbedded volcanics maximum predominantly on hills

present) and near threatened unknO'r'm, requir ing

and ranges of species includ ing further research

Palaeozoic and older I Uf"'ris simm<Jndsii

moderately to

-

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Original Reh abilltaUon Unlls

._RE Description (REDO) proposed

sttongly deformed and metamorphosed sediments and Interbedded volcanics.

Habitat features

Fire Management Guidelines (REDO)

• aurecon

Amended Rehabllilallon Unils

REproposed DescrlpUon (REDO)

Low grass or Lree Cover in rural areas

Non-remnant, N/A

low grass or ' Non-remnant, N/A tree Cover in built up areas

Habitat features

~ Open areas wiD provide habitat for grassland species, lhe inclusion of Lrees will provide cover for insectivorous birds.

Fire Mana9ement Guidelines (REDO)

-

Open areas will N/A provide habitat for grassland species, the inclusion of trees wil l provide cover for insectivorous birds.

Differences between proposed REs

Non-remnant area

Non-remnant

Summary of benefit.s/detracllons as a result of the proposed changes

l I

Document No. 7

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